<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <button>点击获取人员信息</button>
    <script>
        function sendGet(url) {
            return new Promise((resolve, err) => {
                const xhr = new XMLHttpRequest()
                xhr.open('GET', url)
                xhr.send()
                xhr.onreadystatechange = function () {
                    if (xhr.readyState === 4 && xhr.status === 200) {
                      resolve(JSON.parse(xhr.responseText))

                    }
                }
            })
        }

        let btn = document.querySelector('button')
        btn.addEventListener('click', async function () {
            let duanzi = await sendGet('http://127.0.0.1:5000/api')
            console.log(duanzi);
        })

    </script>
</body>

</html>